With mudguards and a good waterproof jacket you can keep pretty dry even in a thunderstorm. But it doesn't rain that much on most races (compared to say PBP 2007 when it rained most of the way) so it doesn't become that critical.
The rain, like everything in the US ,is supersized.
In 2016 there was a rainstorm in Kansas that stopped everyone and caused the field to bunch up -There were about 1o riders staying at in Newton all at once as a result .
Yeah - there are limits. Summer UK-type rain is quite pleasant to ride in when you stay dry and warm. But if there is biblical rain and actual flooding then you are going to get a bit wet whatever your setup.
Not fashionable / cool.
With mudguards and a good waterproof jacket you can keep pretty dry even in a thunderstorm. But it doesn't rain that much on most races (compared to say PBP 2007 when it rained most of the way) so it doesn't become that critical.